Overview
The TRSF3221EIPWR is a 3-V to 5.5-V single-channel RS-232 line driver/receiver manufactured by Texas Instruments. This component is designed to provide the electrical interface between an asynchronous communication controller and the serial-port connector. It features a dual charge-pump circuit and offers robust ESD protection, making it suitable for a variety of applications requiring reliable serial communication.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Package | TSSOP (PW) | 16 pins |
| Operating Temperature Range | -40°C to 85°C | |
| VCC Supply Voltage | 3V to 5.5V | |
| Data Signaling Rate | Up to 1 Mbit/s | |
| Driver Output Slew Rate | 24 V/μs to 150 V/μs | |
| ESD Protection | ±15 kV Human-Body Model (HBM), ±8 kV IEC 61000-4-2 Contact Discharge, ±15 kV IEC 61000-4-2 Air-Gap Discharge | |
| Standby Current | 1 μA typical | |
| External Capacitors | 4 × 0.1 μF |
Key Features
- ESD protection for RS-232 pins: ±15 kV Human-Body Model (HBM), ±8 kV IEC 61000-4-2 Contact Discharge, and ±15 kV IEC 61000-4-2 Air-Gap Discharge.
- Operates with 3V to 5.5V VCC supply.
- Operates up to 1 Mbit/s data signaling rate.
- Low standby current: 1 μA typical.
- External capacitors: 4 × 0.1 μF.
- Accepts 5V logic input with 3.3V supply.
- Auto-powerdown feature automatically disables drivers for power savings.
- Available in near chip-scale package, 16-pin VQFN (RGT, 82% smaller than TSSOP package).
Applications
- Industrial PCs.
- Wired networking.
- Data center and enterprise computing.
- Battery-powered systems.
- PDAs and palmtop PCs.
- Notebooks, sub-notebooks, and laptops.
- Digital cameras.
- Mobile phones and wireless devices.
- Hand-held equipment.
Q & A
- What is the operating voltage range of the TRSF3221EIPWR?
The TRSF3221EIPWR operates with a VCC supply voltage range of 3V to 5.5V.
- What is the maximum data signaling rate of the TRSF3221EIPWR?
The TRSF3221EIPWR operates at data signaling rates up to 1 Mbit/s.
- What type of ESD protection does the TRSF3221EIPWR offer?
The TRSF3221EIPWR offers ±15 kV Human-Body Model (HBM), ±8 kV IEC 61000-4-2 Contact Discharge, and ±15 kV IEC 61000-4-2 Air-Gap Discharge ESD protection.
- What is the standby current of the TRSF3221EIPWR?
The standby current of the TRSF3221EIPWR is 1 μA typical.
- What external capacitors are required for the TRSF3221EIPWR?
The TRSF3221EIPWR requires 4 × 0.1 μF external capacitors.
- Does the TRSF3221EIPWR support auto-powerdown?
Yes, the TRSF3221EIPWR features an auto-powerdown feature that automatically disables drivers for power savings.
- In what packages is the TRSF3221EIPWR available?
The TRSF3221EIPWR is available in 16-pin TSSOP (PW) and near chip-scale 16-pin VQFN (RGT) packages.
- Can the TRSF3221EIPWR accept 5V logic input with a 3.3V supply?
Yes, the TRSF3221EIPWR can accept 5V logic input with a 3.3V supply.
- How does the auto-powerdown feature work in the TRSF3221EIPWR?
The auto-powerdown feature functions when FORCEON is low and FORCEOFF is high. If no valid RS-232 signal is detected, the driver output is disabled, and the supply current is reduced to 1 μA.
- What is the purpose of the INVALID output in the TRSF3221EIPWR?
The INVALID output notifies the user if an RS-232 signal is present at the receiver input. It is high for valid data and low for invalid data.
